Biology:Menemerus paradoxus

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Short description: Species of spider

Menemerus paradoxus
Menemerus semilimbatus male 03.jpg
The related Menemerus semilimbatus
Scientific classification edit
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Araneomorphae
Family: Salticidae
Subfamily: Salticinae
Genus: Menemerus
Species:
M. paradoxus
Binomial name
Menemerus paradoxus
Wesołowska & van Harten, 1994

Menemerus paradoxus is a species of jumping spider in the genus Menemerus that lives in Yemen. The spider was first described in 1994 by Wanda Wesołowska and Anthony van Harten. Only the female has been described. The spider is small, with an oval and rather flattened carapace that is typically 2.5 mm (0.10 in) long and an oval abdomen typically 3.2 mm (0.13 in) long. The carapace is brown with a darker, nearly black, eye field and the abdomen is yellowish-grey. The spider's legs are also yellowish-grey. The spider is hard to distinguish from others in the genus, particularly Menemerus tropicus. However, its copulatory organs are distinctive. Menemerus paradoxus is characterised by its large epigyne that has a notch in its rear edge, the way that its copulatory openings are hidden in pockets and its heavily sclerotized spermathecae.

Taxonomy

Menemerus paradoxus is a species of jumping spider that was first described by Wanda Wesołowska and Anthony van Harten in 1994.[1] It was one of over 500 species identified by the Polish arachnologist Wesolowska during her career, making her one of the most prolific in the field.[2] She allocated the spider to the genus Menemerus, first circumscribed in 1868 by Eugène Simon, which contains over 60 species.[3] The genus name derives from two Greek words, meaning certainly and diurnal.[4]

Genetic analysis has shown that the genus Menemerus is related to the genera Helvetia and Phintella.[5] The genus shares some characteristics with the genera Hypaeus and Pellenes.[6] It is a member of the tribe Heliophaninae, renamed Chrysillini by Wayne Maddison in 2015,[7] The tribe is ubiquitous across most continents of the world.[5] It is allocated to the subclade Saltafresia in the clade Salticoida.[8] In 2016, Prószyński created a group of genera named Menemerines after the genus.[9] The vast majority of the species in Menemerines are members of the genus, with additional examples from Kima and Leptorchestes.[10]

Description

Menemerus paradoxus is a small spider. The female has a carapace that is typically 2.5 mm (0.10 in) long and 1.7 mm (0.07 in) wide. It is oval and rather flattened, with a brown topside covered in dense brown and grey hairs. The eye field is very dark, almost black with a small number of brown bristles visible. The spider's face, or clypeus, and the underside of the carapace, or sternum, are brown. The chelicerae are dark brown with two teeth to the front and one to the rear. The remaining mouthparts, the labium and maxilae, are brown, the maxilae with light tips. The spider has an oval abdomen that is typically 3.2 mm (0.13 in) long and 2.1 mm (0.08 in) wide. The topside is yellowish-grey and covered in brown hairs. The underside is light. The spinnerets are grey. The spider has yellowish-grey legs that are covered in brown hairs. The epigyne is rather large and very highly sclerotized. It has a large central depressions and a rear edge punctuated with a notch. The copulatory openings are hidden in pockets. The insemination ducts have thin walls and lead to heavily sclerotized spermathecae. There are also long accessory glands. There are large and deep pockets near the epigastric furrow.[11] The male has not been described.[1]

Spiders of the Menemerus genus are difficult to distinguish.[12] The spider can be identified by its copulatory organs, particularly its internal structure.[11] For example, compared to the related Menemerus tropicus, the spider has a wider pocket in its epigyne and larger spermathecae. The notch on the rear edge of the spider's epigyne is also characteristic of the species.[13]

Distribution

Menemerus spiders are found throughout Africa and Asia, and have been identified as far as Latin America.[14] Menemerus paradoxus is found in Yemen.[1] The female holotype was found in 1991 near Sanaa.[15] It is only found in the Sanaa Governorate.[16]

References

Citations

  1. ↑ 1.0 1.1 1.2 World Spider Catalog (2017). "Menemerus paradoxus Wesolowska & van Harten, 1994". Bern: Natural History Museum. http://www.wsc.nmbe.ch/species/30744/Menemerus_paradoxus. 
  2. ↑ Wiśniewski 2020, p. 6.
  3. ↑ Mariante & Hill 2020, p. 1.
  4. ↑ Fernández-Rubio 2013, p. 128.
  5. ↑ 5.0 5.1 Maddison & Hedin 2003, p. 541.
  6. ↑ Maddison 2015, p. 233.
  7. ↑ Maddison 2015, p. 231.
  8. ↑ Maddison 2015, p. 278.
  9. ↑ Prószyński 2017, p. 112.
  10. ↑ Prószyński 2017, p. 116.
  11. ↑ 11.0 11.1 Wesołowska & van Harten 1994, p. 98.
  12. ↑ Wesołowska 1999, p. 252.
  13. ↑ Wesołowska 2007, p. 522.
  14. ↑ Mariante & Hill 2020, p. 3.
  15. ↑ Wesołowska & van Harten 1994, p. 37.
  16. ↑ Wesołowska & van Harten 2007, p. 266.

Bibliography

  • Fernández-Rubio, Fidel (2013). "La etimología de los nombres de las arañas (Araneae)" (in ES). Revista ibérica de Aracnología (22): 125–130. ISSN 1576-9518. 
  • Maddison, Wayne P. (2015). "A phylogenetic classification of jumping spiders (Araneae: Salticidae)". The Journal of Arachnology 43 (3): 231–292. doi:10.1636/arac-43-03-231-292. 
  • Maddison, Wayne P.; Hedin, Marshal C. (2003). "Jumping spider phylogeny (Araneae: Salticidae)". Invertebrate Systematics 17 (4): 529–549. doi:10.1071/IS02044. 
  • Mariante, Rafael M.; Hill, David E. (2020). "First report of the Asian jumping spider Menemerus nigli (Araneae: Salticidae: Chrysillini) in Brazil". Peckhamia 205 (1): 1–21. doi:10.5281/zenodo.3875200. 
  • Prószyński, Jerzy (2017). "Pragmatic classification of the World's Salticidae (Araneae)". Ecologica Montenegrina 12: 1–133. doi:10.37828/em.2017.12.1. 
  • Wesołowska, Wanda (1999). "A revision of the spider genus Menemerus in Africa (Araneae: Salticidae)". Genus 10: 251–353. http://www.cassidae.uni.wroc.pl/menemerus.pdf. 
  • Wesołowska, Wanda (2007). "Taxonomic notes on the genus Menemerus in Africa (Araneae: Salticidae)". Genus 18: 517–527. 
  • Wesołowska, Wanda; van Harten, Anthony (1994). The Jumping Spiders (Salticidae, Araneae) of Yemen. Sanaa: Yemeni-German Plant Protection Project. 
  • Wesołowska, Wanda; van Harten, Anthony (2007). "Additions to the knowledge of jumping spiders (Araneae: Salticidae) of Yemen". Fauna of Arabia 23: 189–269. 
  • Wiśniewski, Konrad (2020). "Over 40 years with jumping spiders: on the 70th birthday of Wanda Wesołowska". Zootaxa 4899 (1): 5–14. doi:10.11646/zootaxa.4899.1.3. PMID 33756825. 

Wikidata ☰ Q2915342 entry



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